Radiant Heat Repair Experts on Long Island
Hydronic radiant heating is common in Long Island homes, especially in established neighborhoods across Nassau and Suffolk County. Hot water from a boiler circulates through baseboard radiators or in-floor tubing, providing even, comfortable heat without blowing air or creating hot and cold spots.
When a zone stops heating, pressure drops, or pipes start making noise, LI Heating & Cooling provides fast, accurate diagnosis. We stock zone valves, circulator pumps, expansion tanks, and common boiler parts on every truck to maximize same-day repair rates across Long Island.
Radiant systems require specialized knowledge — understanding how zones interact, how to pressure test for leaks, and how the boiler controls each zone. Our technicians are experienced with all types of hydronic distribution systems found in Long Island homes.
Common Radiant Heat Problems We Fix
- ✓One or more zones not heating — cold rooms despite boiler running
- ✓Boiler pressure dropping repeatedly (indicates a hydronic leak)
- ✓Banging, knocking, or gurgling sounds in pipes or baseboards
- ✓Zone valve stuck open or closed
- ✓Circulator pump failure — zone won't flow
- ✓Air trapped in system causing uneven heating
- ✓Expansion tank waterlogged — pressure fluctuating wildly
- ✓Visible water leaks at fittings, valves, or baseboards
- ✓Thermostat calling for heat but zone not responding
- ✓Boiler short-cycling due to zone pressure issues